I guess I see some of this as being a problem with us moms. Obviously you want to see a child do enough problems to show that he does, actually, understand what he's doing. But with an HG+ kid, that might not require very many problems.
I must say this is where Montessori worked really great for us. We taught him the concepts over the dinner and they eventually made him do the practice in school
I too am not really sure where to start with Singapore Math. We will probably spend first few months filling up gaps and skipping over the rest of the material.
